^(t? cat 



Fig. ao. Explanation or Fici'nES of Sand-doixak. 



1. Diagram of one fifth of Aristotle's lantern of />(Hrfrnxf<'i- show- 

 ing three loops of the circumoral nerve ring, and parts of three 

 railial nerves, the central one partly hidden at its origin by the 

 lantern. The nerves are in black. X'.t. 



2. Drawing of part of the first part of an oral railial nerve. Xil. 

 :{. Drawing of the lower end of an oral ra<lial nerve. X9. 



